class People {
   float hello(int a,int b){
	return a+b;
    }
    float hello (long a,int b){
	return a-b;
    }
    double hello(double a,int b){
	return a*b;
    }
}
public class E4_12{
    public static void main(String x[]){
	People tom = new People();
	System.out.println(tom.hello(10,20));
	System.out.println(tom.hello(10L,20));
	System.out.println(tom.hello(10.0,20));
    }
}